CN217513134U

CN217513134U - Flexible welding wire

Info

Publication number: CN217513134U
Application number: CN202221045090.2U
Authority: CN
Inventors: 石磊; 杨学顺; 祝道波; 陈凯
Original assignee: Zhejiang Asia General Soldering & Brazing Material Co ltd
Current assignee: Zhejiang Yatong New Materials Co ltd
Priority date: 2022-04-26
Filing date: 2022-04-26
Publication date: 2022-09-30
Anticipated expiration: 2032-04-26

Abstract

The utility model discloses a flexible welding wire, including core wire, coating, the coating includes cladding portion, extension portion, and the first end of cladding portion on the width direction and second end dislocation overlap joint form the appearance chamber of accomodating the core wire, and first end is in wholly outwards extending on the length direction of welding wire forms extension portion, and the inside wall pressfitting of extension portion is on the lateral wall of second end. The utility model discloses in, with the structural stability of core wire cladding in order to guarantee whole welding wire in the cladding portion, the event need not consider the mechanical properties of core wire again, even the fragile powder can also be used to the processing and the use degree of difficulty of greatly reduced fragile core wire.

Description

Flexible welding wire

Technical Field

The utility model relates to a flexible welding wire.

Background

The aluminum alloy has wide application in industrial production and social life, and the important function of the aluminum alloy in modern industrial materials cannot be replaced due to small specific gravity, good electric conductivity and thermal conductivity, good castability, plasticity and mechanical processing performance. However, the problems of welding of copper-aluminum components are more and more brought, and at present, the copper-aluminum components are mostly connected by brazing with zinc-aluminum brazing filler metal, aluminum-silicon brazing filler metal or aluminum-silicon-copper brazing filler metal, but the copper-aluminum components have some defects. When the zinc-aluminum brazing filler metal is used for welding a copper-aluminum component, electrochemical corrosion is easy to occur at the position of a welding joint, and the service life is short; the melting point of the aluminum-silicon brazing filler metal is high, the solidus temperature is 577 ℃, the liquidus temperature is above 600 ℃, the melting point is very close to that of the high-strength aluminum alloy, and the aluminum-silicon brazing filler metal is easy to overburn during brazing; aluminum-silicon-copper brazing filler metal welded joint is good in corrosion resistance, but the brazing filler metal is brittle and poor in processability, the brazing filler metal is difficult to process into a disc-shaped welding wire or a welding ring, continuous automation and efficient brazing requirements cannot be met, and improvement is needed urgently.

SUMMERY OF THE UTILITY MODEL

For solving the technical problem who exists among the background art, the utility model provides a flexible welding wire, including core wire, coating, the coating includes cladding part, extension, and the first end of cladding part on the width direction forms the appearance chamber of accomodating the core wire with second end dislocation overlap joint, and first end is in wholly outwards extending on the length direction of welding wire forms the extension, and the inside wall pressfitting of extension is on the lateral wall of second end.

Preferably, the clad layer has a tensile deformation in the length direction.

Preferably, there is a radial crush deformation between the first end and the second end.

Preferably, the transition is smooth at the seam of the wrap and the extension.

Preferably, the core wire is a uniformly mixed aluminum-silicon-copper powder and aluminum-brazing flux powder contained in the cladding space under pressure.

Preferably, the aluminum-silicon-copper powder is obtained by vacuum melting and gas atomization of brazing filler metal consisting of copper, silicon, nickel and aluminum.

Preferably, the aluminum brazing flux powder comprises mechanically homogenized potassium fluoroaluminate powder and cesium fluoroaluminate powder.

The utility model discloses in, with the structural stability of core wire cladding in order to guarantee whole welding wire in the cladding, the event need not consider the mechanical properties of core wire again, even the brittle powder can also be used to greatly reduced brittle core wire's the processing and the use degree of difficulty.

Drawings

FIG. 1 is a schematic cross-sectional view of an embodiment of a flexible welding wire according to the present invention;

FIG. 2 is a schematic cross-sectional view of an embodiment of a flexible welding wire according to the present invention;

fig. 3 is a schematic view of a partial structural section of an embodiment of a flexible welding wire according to the present invention.

Detailed Description

As shown in fig. 1-3, the utility model provides a flexible welding wire, including core wire 1, coating 2 includes cladding 21, extension 22, and cladding 21 misplaces the overlap joint with second end 212 and forms the appearance chamber 3 of accomodating core wire 1 in the ascending first end 211 of width direction, and first end 211 is in the whole outside extension forms extension 22 on the length direction of welding wire, and the inside wall 221 pressfitting of extension 22 is on the lateral wall 213 of second end 212.

The utility model provides a flexible welding wire with core 1 cladding in order to guarantee the structural stability of whole welding wire in cladding 21, the event need not consider core 1's processability again to greatly reduced brittleness core 1's the processing and the use degree of difficulty.

Preferably, the clad layer 2 has a tensile deformation in the length direction.

The tensile in length direction can improve the cladding force of cladding 2 to core wire 1, reduces the processing degree of difficulty of product to and improve the structural strength of product, in addition, can be under the supplementary diversified product of different radius specifications of shaping of sizing mould.

Preferably, there is a radially compressive deformation between the first end 21 and the second end 21.

The radial extrusion can improve the cladding force of the cladding layer 2 on the welding core 1, reduce the processing difficulty of the product and improve the structural strength of the product.

The joint between the cladding part 21 and the extension part 22 is smoothly transited.

Through tensile deformation in the length direction and with the assistance of a sizing die, the joint of the cladding part 21 and the extension part 22 can be in smooth transition, so that the attractiveness of the product is improved, the product can be fixed in use, and the strength of the product can be improved from a structural angle.

The core wire 1 is a uniformly mixed aluminum-silicon-copper powder and aluminum brazing filler metal powder which are contained in the cladding space 3 under pressure.

The aluminum-silicon-copper powder and the aluminum brazing filler metal powder are brittle brazing filler metal and are brittle powder formed by physically mixing, and the aluminum-silicon-copper powder and the aluminum brazing filler metal powder can be shaped and used through the structure.

The aluminum-silicon-copper powder is obtained by vacuum melting and atomizing brazing filler metal consisting of copper, silicon, nickel and aluminum.

The aluminum brazing flux powder comprises potassium fluoroaluminate powder and cesium fluoroaluminate powder which are mechanically and uniformly mixed.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a flexible welding wire, its characterized in that, includes core wire (1), cladding (2) are including cladding (21), extension (22), and first end (211) of cladding (21) on the width direction and second end (212) dislocation overlap joint form and accomodate appearance chamber (3) of core wire (1), and first end (211) are in wholly outwards extend on the length direction of welding wire and form extension (22), and inside wall (221) pressfitting of extension (22) is on lateral wall (213) of second end (212).

2. Flexible welding wire according to claim 1, characterised in that the coating (2) has a tensile deformation in the length direction.

3. The flexible welding wire according to claim 1, characterized in that there is a radial compression deformation between the first end (211) and the second end (212).

4. Flexible welding wire according to claim 1, characterised in that the transition is smooth at the joint between the cladding (21) and the extension (22).